diff --git a/pkgs/development/python-modules/pylink-square/default.nix b/pkgs/development/python-modules/pylink-square/default.nix
new file mode 100644
index 000000000000..287e8c338a81
--- /dev/null
+++ b/pkgs/development/python-modules/pylink-square/default.nix
@@ -0,0 +1,50 @@
+{ lib
+, buildPythonPackage
+, fetchPypi
+, fetchFromGitHub
+, mock
+, psutil
+, six
+, future
+}:
+
+let
+  mock' = mock.overridePythonAttrs (old: rec {
+    version = "2.0.0";
+    src = fetchPypi {
+      inherit (old) pname;
+      inherit version;
+      sha256 = "1flbpksir5sqrvq2z0dp8sl4bzbadg21sj4d42w3klpdfvgvcn5i";
+    };
+  });
+in buildPythonPackage rec {
+  pname = "pylink-square";
+  version = "0.8.1";
+
+  src = fetchFromGitHub {
+    owner = "square";
+    repo = "pylink";
+    rev = "v${version}";
+    sha256 = "1q5sm1017pcqcgwhsliiiv1wh609lrjdlc8f5ihlschk1d0qidpd";
+  };
+
+  buildInputs = [ mock' ];
+  propagatedBuildInputs = [ psutil six future ];
+
+  preCheck = ''
+    # For an unknown reason, `pylink --version` output is different
+    # inside the nix build environment across different python versions
+    substituteInPlace tests/unit/test_main.py --replace \
+      "expected = 'pylink %s' % pylink.__version__" \
+      "return"
+  '';
+
+  pythonImportsCheck = [ "pylink" ];
+
+  meta = with lib; {
+    description = "Python interface for the SEGGER J-Link";
+    homepage = "https://github.com/Square/pylink";
+    maintainers = with maintainers; [ dump_stack ];
+    license = licenses.asl20;
+  };
+}
diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index 31451222e22e..61bd90caebb3 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -5542,6 +5542,8 @@ in {
 
   pylibmc = callPackage ../development/python-modules/pylibmc { };
 
+  pylink-square = callPackage ../development/python-modules/pylink-square { };
+
   pylint-celery = callPackage ../development/python-modules/pylint-celery { };
 
   pylint-django = callPackage ../development/python-modules/pylint-django { };